Since 2008, NASA’s two TWINS spacecraft have been providing a sterescopic view of the ring current — a hula hoop of charged particles that encircles Earth. (Credit: J. Goldstein/SWRI)
Home Since 2008, NASA’s two TWINS spacecraft have been providing a sterescopic view of the ring current — a hula hoop of charged particles that encircles Earth. (Credit: J. Goldstein/SWRI) Since 2008, NASA’s two TWINS spacecraft have been providing a sterescopic view of the ring current -- a hula hoop of charged particles that encircles Earth. (Credit: J. Goldstein/SWRI)